2120 by George Wylesol
You're Wade, a schlubby middle-aged computer repairman, sent to fix a computer in a vacant, nondescript office building. When you get inside the door locks behind you, and you can't get out. Now the adventure begins! You have to explore this building and try to find your way home. The building is huge on the inside with a lot of sprawling hallways and empty rooms but your only hope is to uncover clues and try to work out the mystery this whole experience hangs on.
Presented as a blend of classic choose your own adventure stories and point and click escape games, 2120 offers readers the chance to explore these liminal spaces and, at the same time, take an existential journey of discovery.